Adjusting the thread tension
The standard bobbin thread tension is such that
the bobbin case goes down slowly when you hold
the open end of the bobbin thread and shake it as
shown at right. (The count of the thread is #50.)
* Adjust the needle thread tension in accordance
with the bobbin thread tension.
* The bobbin case is an exclusive JUKI part. Please
consult the JUKI dealers when you purchase it.
· Adjusting the bobbin case
Tension ad-
justing screw
Increase
Decrease
Improperly adjusted thread tension may
cause puckering on materials, inferior
stitches, or thread breakage.
Center of
the material
Needle thread
Bobbin thread
Bobbin
thread
Needle thread
Bobbin
thread
The needle thread tension is too low
The needle thread tension is too high
Thread tension
dial
Increase the
needle thread
tension.
Decrease the
needle thread
tension.
Needle thread
■
Proper thread tension
Thread tension
dial
CAUTION:
Turn OFF the power switch when taking out the bobbin case.
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